Re: Taylor detector

2022-08-13 Thread Steve Hubbard
Hi, It's not clear to me why you would want to do this. As far as I can see, the purpose of a Tayloe detector is to mix a real-valued RF signal with a complex-valued local oscillator to arrive at an intermediate frequency at or near zero frequency that can be sampled using a sound card. If

Re: ETTUS N210 spurious

2022-02-01 Thread Steve Hubbard
Sorry for the late reply. I am guessing you are seeing aliases of the audio signal. Sampling a 1 kHz signal at 32 kHz produces aliases around multiples of the 32 kHz. In the signal processing chain the sampling rate will be increased in stages until the DAC sampling rate is reached. This

Re: N310 phase sync issue with antenna array

2021-07-01 Thread Steve Hubbard
wavelength. Beyond that there's a 4th power law drop off. https://en.wikipedia.org/wiki/Two-ray_ground-reflection_model I hope this helps. Steve Hubbard

Re: the principle of "constellation modulator"?

2021-05-07 Thread Steve Hubbard
response said, the centre frequency is zero. If you want any other frequency, a complex mix is required. To help you understand this you could try writing some code in Matlab, Octave or Python etc. to implement a simple signal chain. Regards, Steve Hubbard On 7/5/21 7:03 pm, wrote

Gnuradio 3.8 on Cent OS 7

2020-05-18 Thread Steve Hubbard
I am trying to install Gnuradio 3.8 on Cent OS 7 from source https://wiki.gnuradio.org/index.php/InstallingGR#For_GNU_Radio_3.8_or_Earlier and I get this error: -- Looked for LOG4CPP libraries named log4cpp. CMake Error at cmake/Modules/FindLOG4CPP.cmake:46 (message):   Could NOT find LOG4CPP

Python decimation block

2020-05-13 Thread Steve Hubbard
Hi, I am quite new to Gnuradio and Python and have been trying to create my own functionality using the embedded Python block in GRC. A synchronous block worked fine but a decim_block complained it was only getting 4 args instead of 5. The doco at